I built a sun trap and floated it in the middle of the pond. Maybe that was a mistake as it took months for the turtles to find it. Nothing, nothing, nothing, then one day about ten. Then never any ever again.

I ended up getting most of them by throwing out a half dozen lines every night with pepperoni on small hooks they can easily swallow (e.g. #2). Works on snappers and bullheads too.

grower of champion bullheads